pgd = pgd_offset(vma->vm_mm, addr);do{ next =pgd_addr_end(addr, end);if(pgd_none_or_clear_bad(pgd))continue;if(unuse_pud_range(vma, pgd, addr, next, entry, page))return1; }while(pgd++, addr = next, addr != end);return0; } 开发者ID:acassis,项目名称:emlinux-ssd1935,代...